From: Evgeny Voevodin <e.voevodin@xxxxxxxxxxx>
Virtio back-end devices can be plugged into both transports:
VIRTIO_PCI and VIRTIO_MMIO. In order to choose the desired
transport we have a property "transport" in every back-end
state struct. By specifying -device virtio-blk-pci user chooses
VIRTIO_PCI transport and "transport" property is set automatically.
But in order to provide full control to user we need to have
"transport" property available to be set through command line:
-device virtio-pci,id=virtio-pci.0
-device virtio-blk,transport=virtio-pci.0,...
Signed-off-by: Evgeny Voevodin <e.voevodin@xxxxxxxxxxx>
[Minor change : Modification of function name ( virtio_find_transport(..) )]
Signed-off-by: KONRAD Frederic <fred.konrad@xxxxxxxxxxxxx>
---
hw/qdev-properties.c | 29 +++++++++++++++++++++++++++++
hw/qdev.h | 3 +++
2 files changed, 32 insertions(+)
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 8aca0d4..789ba2e 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -2,6 +2,7 @@
#include "qdev.h"
#include "qerror.h"
#include "blockdev.h"
+#include "virtio-transport.h"
#include "hw/block-common.h"
#include "net/hub.h"
@@ -526,6 +527,34 @@ PropertyInfo qdev_prop_drive = {
.release = release_drive,
};
+/* --- virtio transport --- */
+
+static int parse_transport(DeviceState *dev, const char *str, void **ptr)
+{
+ VirtIOTransportLink *trl;
+
+ trl = virtio_find_transport_by_id(str);
+
+ if (trl == NULL) {
+ return -ENOENT;
+ }
+
+ *ptr = trl;
+
+ return 0;
+}
+
+static void set_transport(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ set_pointer(obj, v, opaque, parse_transport, name, errp);
+}
+
+PropertyInfo qdev_prop_transport = {
+ .name = "transport",
+ .set = set_transport,
+};
+
/* --- character device --- */
static int parse_chr(DeviceState *dev, const char *str, void **ptr)
diff --git a/hw/qdev.h b/hw/qdev.h
index c6ac636..cc784c5 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -232,6 +232,7 @@ extern PropertyInfo qdev_prop_macaddr;
extern PropertyInfo qdev_prop_losttickpolicy;
extern PropertyInfo qdev_prop_bios_chs_trans;
extern PropertyInfo qdev_prop_drive;
+extern PropertyInfo qdev_prop_transport;
extern PropertyInfo qdev_prop_netdev;
extern PropertyInfo qdev_prop_vlan;
extern PropertyInfo qdev_prop_pci_devfn;
@@ -293,6 +294,8 @@ extern PropertyInfo qdev_prop_pci_host_devaddr;
DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, NetClientState*)
#define DEFINE_PROP_DRIVE(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *)
+#define DEFINE_PROP_TRANSPORT(_n, _s, _f) \
+ DEFINE_PROP(_n, _s, _f, qdev_prop_transport, VirtIOTransportLink *)
#define DEFINE_PROP_MACADDR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
#define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
--
1.7.11.7
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